Assume z is a standard normal random variable. Then P(-1.96 ≤z≤-1.4) equals O a..475 O b..8942 O c..4192 Od..0558

Q: P(x <83) P(x <83) = (Round to four decimal places as needed.) ....

A: It is given that  Mean, μ = 90 Standard deviation, σ = 5 Z-Score, Z = ( X - μ )/σ

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: Solution: Given information: Margin of error = E= 0.03 Confidence level = 90%= 0.90 α=1-C= 0.10…

Q: Why is the expected value 50.50? When you've said it should be 100/2 in the explanation?

A: GivenA fair 100 sided dice is rolled where each outcome has equal probability =1100The expected…

Q: 4.11 Age and Sleep The scatterplot shows the age and number of hours of sleep "last night" for some…

A: Given that: Scatterplot of Age vs Hours of sleep is provided. Correlation describes the degree to…

Q: The regression equation is Y = i + i X.

A: Use the Excel and Perform the Regression. Followings are the Steps to perform the Regression 1) Open…

Q: sures income in $10,000 for the 5 (hint: Xx). You decide to random of 11.

A: The distribution for particular type sampling for the structural basis which have the perspective…

Q: Name Course and Year Exercise 5.1 Determine the sample variance and standard deviation for the…

A: Class Frequency (f) Mid value (x) f⋅ x f⋅x2=(f⋅ x)×(x) 10-14 5 12 60 720 15-19 20 17 340 5780…

Q: A sales manager for an advertising agency believes there is a relationship between the number of…

A: Note: Hey there! Thank you for posting the question. Since your post contains more than one…

Q: The p-value is the         [ Select ]      ["probability you get the sample statistic or more…

A: Please find the explanation below. Thank you

Q: Use the standard normal table to find the z-score that corresponds to the cumulative area 0.7123. If…

A: Solution: Let Z be the standard normal variable with mean 0 and standard deviation 1.  Z~N(0,1)

Q: In a 2009 survey by I-Pension LLC, adults with annual household incomes of $50,000 to $125,000 were…

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Q: You measure 29 turtles' weights, and find they have a mean weight of 44 ounces. Assume the…

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Q: Suppose we have a distribution of the number of "friends" all users of a popular social media site…

A: Given: Suppose we have a distribution of the number of "friends" all users of a popular social media…

Q: 29. Exam scores for an afternoon algebra class are: 99,56,78,55.5,…

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Q: In a small town in New York, we initiated a cohort study and followed 5,900 people for a mean…

A: Given that in a small town in New York, we initiated a cohort study and followed 5,900 people for a…

Q: calculate these mortality rates: A) Crude mortality rate due to cancer B) Age specific mortality…

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Q: 4.16 Age at first marriage, Part I: The National Survey of Family Growth conducted by the Centers…

A: Given Information: Sample size n=5534 Sample mean x¯=23.3 Population standard deviation σ=4.7

Q: A researcher would like to test the claim that the proportion of middle-aged smokers with a lung…

A: Claim of the study;A researcher would like to test the claim that the proportion of middle-aged…

Q: The average cost of tuition plus room and board for a small private liberal arts college is reported…

A: Note: Hey there! Thank you for posting the question. Since your question has more than one question,…

Q: Lombard Electronics Company has just installed a new machine that makes a part that is used in…

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Q: Η 0.1 0.4 11 0.25 C

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Q: To compute the confidence interval use a distribution. b. With 95% confidence the population mean…

A: It is given that  The data in discrete form of size 11 is 15 12 9 25 20 9 6 10 7 26 27

Q: In a 2009 survey by I-Pension LLC, adults with annual household incomes of $50,000 to $125,000 were…

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Q: In his book Outliers, author Malcolm Gladwell argues that more baseball players have birthdates in…

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Q: The average grade for an exam is 74, and the standard deviation is 7. If 11.9% of the class is given…

A: Given: μ = 74 σ = 7 Formula Used: z-score = X-μσ

Q: In this exercise, a two-way table is shown for two groups, 1 and 2, and two possible outcomes, A and…

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Q: If, in a sample of n=16 selected from a normal​ population, X=57 and S=20​, what is the value…

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Q: The mean cost of the ingredients of a chicken parmesan meal bought at the grocery store is $15.…

A: Solution:

Q: What conditions are necessary in order to use the dependent samples t​-test for the mean of the…

A: Necessary conditions for dependent samples in t-test, and for the difference in the means of two…

Q: . A pharmaceutical company conducted a study to test the effectiveness of its new antidepression…

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Q: 30. The following data represents the number of days absent, x, and the final grade, y, for a sample…

A: Given : No. of absences  x Final Grade y 0 89.2 1 86.4 2 83.5 3 81.1 4 78.2 5 73.9…

Q: Strikeouts 260- 240 220 200 180 160 140 120 100 B. (Source: StatCrunch: 2011 MLB Pitching Stats…

A: Correlation defines how strong or weak association between two variables i.e., independent and…

Q: A sample of assistant professors on the business faculty at state-supported institutions in Ohio…

A: It is given that the mean is 72000 and the standard deviation is 3000.

Q: Q5. The sampling distribution of mean is the hypothetical distribution of means from all Possible…

A: Here we have to check whether given statement is true or false  "The sampling distribution of mean…

Q: The length of time for one individual to be served at a cafeteria is a random variable having an…

A: Given: The mean time for one individual to be served at a cafeteria is μ = 4 minutes λ = 14 Formula…

Q: Let Y(t) = (ao+a₁ X(t)) cos(2π ft+0), where a, are constants, is uniform on [0, 27], X(t) is a…

A: Solution:

Q: (a) What is the probability that the web site has fewer than 5 million visitors in a single day? If…

A: as per guidelines i have calculated 3 subparts here given ,Assume that the traffic to the web site…

Q: hypothesis testing, we seek evidence against Ha as a way of to bolster H0. True False None of the…

A: Null hypothesis is denoted by Ho  It is defined as a claim that there is no difference in…

Q: The makers of a smartphone have received complaints that the face recognition tool often doesn't…

A: The following information has been given: n1=80       p^1=0.70n2=75       p^2=0.56

Q: A physician wants to see if there was a difference in the average smokers' daily cigarette…

A: To find: What is the correct p-value?

Q: Here are summary statistics for randomly selected weights of newborn girls: n=167, x= 30.6 hg, s=…

A: We have to find confidence interval for population Mean (μ) Since population standard deviation (σ)…

Q: A local dermatologist claims that more than 30% of mole biopsies are unnecessary. Last month at his…

A: The given claim of the test is more than 30% of mole biopsies are unnecessary.

Q: Find the minimum sample size needed to estimate the percentage of managers who have a cat. Use a…

A: Given For 99.8% CI is 2.8782 P=0.5 Margin of error=0.06

Q: The mean and the standard deviation of a normal population are 11,795 and 14054 respectively. If n=…

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Q: 3) President Biden's approval rating is 38.6%. Suppose that 8 people were chosen at random a) Find…

A: Givenp=0.386sample size(n)=8Let "x" be the no.of people approve of the job president Biden is…

Q: For a given confidence level, t*df is larger than z*. . Explain how t*df being slightly larger than…

A: Suppose there are n data points. We need to compute that confidence interval. For t confidence…

Q: Let X ∼N(√2 ,(σ^2)), where (σ^2) > 0 is unknown. Suppose we have that P(X > 2√3) = 0.2 . Find (σ^2).

A: From the provided information, X~N (√2, σ2) Here σ2 &gt; 0 P (X &gt; 2√3) = 0.2

Q: What is the sum of squared deviations (SS) of the data set (N=5) as shown below? DATA: 7, 13, 5, 9,…

A: Data given 7,13,5,9,16  N=5

Q: What is the Standard Deviation and the Percentage that falls within the 1 Distance of Standard…

A: N=30 for the given data  First we will calculate mean  We have to calculate standard deviation and…

Q: Stem Leaves 41 0123678 42 0135789 43 015679 44 006888 45 2237899 The value of the 26th percentile…

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